CNRFC - Hydrology - Observed River/Reservoir Conditions

SOUTH FORK EEL RIVER - MIRANDA (MRNC1)

Latitude: 40.18º N	Longitude: 123.78º W	Elevation: 263 Feet
Location: Humboldt County in California		Bulletin Group: North Coast		River Group: North Coast

Action/Monitor: 27.0 Feet

Minor Flood: 33.0 Feet

Moderate Flood: 38.0 Feet

Major Flood: 42.0 Feet

Plot Type:

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View US Geological Survey (USGS) Data for this station location.

Historical Mean Daily Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025	41,800	25.26	Nov 22, 2024
2024	35,300	23.24	Jan 14, 2024
2023	51,700	28.16	Dec 30, 2022
2022	19,900	18.07	Oct 24, 2021
2021	10,000	14.14	Jan 13, 2021
Historical High Stage/Flow Events (Period of Record - Oct 1939 to Present) - Ranked by Flow
1965	199,000	46.00	Dec 22, 1964
1956	173,000	42.70	Dec 22, 1955
1986	123,000	38.29	Feb 17, 1986
1982	123,000	34.79	Dec 19, 1981
1974	122,000	34.57	Jan 16, 1974
1960	117,000	34.61	Feb 08, 1960

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
47.0 Feet	Extensive and severe flooding of all areas along the river. Severe damage to roads, bridges and structures can be expected. US Highway 101 and Highway 254 (Avenue of the Giants) will likely be closed. All persons in the vicinity of the river should take appropriate actions to protect life and property.
45.0 Feet	Severe flooding of many communities and roads along the river can be expected. Numerous road closures are likely, possibly including US Highway 101 and Highway 254 (Avenue of the Giants). All persons in the vicinity of the river should take appropriate actions to protect life and property.
42.0 Feet	Extensive and severe flooding of many portions of the Avenue of the Giants, especially areas in the vicinity of Sylvandale, Myers Flat, Weott and Phillipsville. Expect numerous road closures in these areas.
38.0 Feet	Considerable flooding of portions of the Avenue of the Giants (Highway 254) in the vicinity of Sylvandale, Myers Flat and Weott, with numerous road closures expected. Minor flooding will begin along Phillipsville Road and adjacent low lying areas.
35.0 Feet	Considerable flooding of portions of Avenue of the Giants in the vicinity of Sylvandale, Myers Flat and Weott is likely. Expect closure Of Avenue of the Giants (Highway 254) in numerous locations.
33.0 Feet	Flooding of portions of the Avenue of the Giants is likely in the vicinity of Sylvandale, and the Myers Flat and Redwood Giants Trailer Park. Flooding is also possible near Weott.
30.0 Feet	Flooding of portions of the Avenue of the Giants may occur, especially in the vicinity of Sylvandale and the Myers Flat and Redwood Giants Trailer Park.
27.0 Feet	Flooding of portions of the Avenue of the Giants (Highway 254) is possible near Sylvandale.

Official 7 Day National Weather Service Forecast (CAZ106)

Tonight: Partly cloudy. Patchy valley fog overnight. Lows 35 to 45.

Tuesday: Mostly sunny. Patchy valley fog in the morning. Highs 47 to 59.

Tuesday Night: Mostly clear. Patchy valley fog overnight. Lows 34 to 44.

Wednesday: Mostly cloudy. Patchy valley fog. Highs 48 to 62.

Wednesday Night: Rain. Snow level 5000 feet overnight. Lows 38 to 48.

Thursday: Mostly cloudy. Chance of rain. Snow level 5000 feet. Highs 47 to 62.

Thursday Night: Mostly cloudy in the evening then becoming partly cloudy. Slight chance of rain. Lows 34 to 44.

Friday through Saturday: Partly cloudy. Highs 53 to 68. Lows 35 to 45.

Saturday Night and Sunday: Partly cloudy. Patchy valley fog. Lows 37 to 47. Highs 53 to 68.

Sunday Night: Partly cloudy in the evening then becoming mostly cloudy. Patchy valley fog. Chance of rain. Lows 38 to 48.

Monday: Mostly cloudy. Chance of rain. Highs 50 to 63.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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